Function zmq::proxy_steerable_with_capture

pub fn proxy_steerable_with_capture(
    frontend: &mut Socket, 
    backend: &mut Socket, 
    capture: &mut Socket, 
    control: &mut Socket
) -> Result<()>

Start a 0MQ proxy in the current thread, with capture and control sockets.

Provides a steerable proxy with a capture socket. See proxy_with_capture